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BUG#12911710 - VALGRIND FAILURE IN ROW-DEBUG:PERFSCHEMA.SOCKET_SUMMARY_BY_INSTANCE_FUNC

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Converting the number zero to binary and back yielded the number zero,
but with no digits, i.e. zero precision.
This made the multiply algorithm go haywire in various ways.


include/decimal.h:
  Document struct st_decimal_t
mysql-test/r/type_newdecimal.result:
  New test case (valgrind warnings)
mysql-test/t/type_newdecimal.test:
  New test case (valgrind warnings)
sql/my_decimal.h:
  Remove the HAVE_purify enabled/disabled code.
strings/decimal.c:
  Make a proper zero, with non-zero precision.
This commit is contained in:
Tor Didriksen 2011-08-29 11:24:36 +02:00
commit f610c56587
5 changed files with 43 additions and 6 deletions
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9
include/decimal.h
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@ -21,6 +21,15 @@ typedef enum
decimal_round_mode;
typedef int32 decimal_digit_t;
/**
intg is the number of *decimal* digits (NOT number of decimal_digit_t's !)
before the point
frac is the number of decimal digits after the point
len is the length of buf (length of allocated space) in decimal_digit_t's,
not in bytes
sign false means positive, true means negative
buf is an array of decimal_digit_t's
*/
typedef struct st_decimal_t {
int intg, frac, len;
my_bool sign;